94e5a85b3b
Initialize the contents of the vectors page immediately after we allocate the page, but before we map it. This avoids any possible aliases with other mappings which may need to be flushed after the page has been mapped irrespective of the cache type. We follow this later with a flush_cache_all() after all static memory mappings have been initialized, which ensures that this is safe from any cache effects. Tested-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
#ifndef _ASMARM_TRAP_H
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#define _ASMARM_TRAP_H
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#include <linux/list.h>
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struct pt_regs;
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struct task_struct;
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struct undef_hook {
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struct list_head node;
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u32 instr_mask;
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u32 instr_val;
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u32 cpsr_mask;
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u32 cpsr_val;
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int (*fn)(struct pt_regs *regs, unsigned int instr);
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};
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void register_undef_hook(struct undef_hook *hook);
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void unregister_undef_hook(struct undef_hook *hook);
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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static inline int __in_irqentry_text(unsigned long ptr)
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{
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extern char __irqentry_text_start[];
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extern char __irqentry_text_end[];
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return ptr >= (unsigned long)&__irqentry_text_start &&
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ptr < (unsigned long)&__irqentry_text_end;
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}
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#else
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static inline int __in_irqentry_text(unsigned long ptr)
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{
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return 0;
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}
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#endif
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static inline int in_exception_text(unsigned long ptr)
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{
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extern char __exception_text_start[];
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extern char __exception_text_end[];
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int in;
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in = ptr >= (unsigned long)&__exception_text_start &&
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ptr < (unsigned long)&__exception_text_end;
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return in ? : __in_irqentry_text(ptr);
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}
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extern void __init early_trap_init(void *);
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extern void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame);
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extern void ptrace_break(struct task_struct *tsk, struct pt_regs *regs);
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extern void *vectors_page;
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#endif
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